Topic 1B: Local Control Blood Flow

Question 1

Tissue demand (4) “need and leave”

Answer 1

• Delivery oxygen & other nutrients
• Removal of waste (carbon dioxide & hydrogen ions)
• Maintain appropriate ion concentrations
• Supply needed hormones

Question 2

demand within tissue will ___ over time

Answer 2

vary

Question 3

How does changes in flow to one tissue impact the flow to all other tissues?

Answer 3

it must not impact flow to all other tissues

Question 4

Control of Tissue blood flow wants what for the heart?

Answer 4

to keep work of heart as low as possible

Question 5

BF % CO

Heart muscle

Answer 5

3%

Question 6

BF % CO

Brain

Answer 6

14%

Question 7

BF % CO

Skeletal Muscle inactive

Answer 7

15%

Question 8

BF % CO

Bone

Answer 8

5%

Question 9

BF % CO

GI/spleen

Answer 9

21%

Question 10

BF % CO

liver

Answer 10

7%

Question 11

BF % CO

kidney

Answer 11

22%

Question 12

BF % CO

skin (cool)

Answer 12

6%

Question 13

BF % CO

other

Answer 13

8%

Question 14

BF % CO

Bronchi

Answer 14

2%

Question 15

ml/min

muscle active

Answer 15

16,000 ml/min

80 ml/min/100gm tissue weight

Question 16

Acute (metabolic control)

Answer 16

Sudden (seconds) changes in metabolism; oxygen content; input pressure
Finite response

Question 17

Acute (metabolic control) controlled mainly by

Answer 17

Controlled mainly vasodilation / vasoconstriction of arterioles, metarterioles, precapillary sphincters

Question 18

Long term (metabolic control)

Answer 18

More permanent changes in metabolism; oxygen content; input pressure
Almost infinite response
takes days/weeks

Question 19

Long term (metabolic control) controlled by?

Answer 19

Controlled by increasing / decreasing physical size and number of blood vessels within tissue